Journal
POLYMERS
Volume 10, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/polym10010006
Keywords
P(VDF-TrFE); polarization; depolarization field; fatigue
Categories
Funding
- National Natural Science Foundation of China [51503121]
- program of foreign visiting studies of teachers in Shanghai colleges and universities
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The characteristics of ferroelectric capacitors with poly(vinylidene fluoride-trifluoroethlene) (P(VDF-TrFE)) films have been studied at different structures of cell electrodes. It is suggested that the effect of electrode structures could induce changes of performance. Remarkably, cells with line electrodes display a better polarization and fatigue resistance than those with flat electrodes. For P(VDF-TrFE) ultrathin films with different electrode structures, the models of charge compensation mechanism for depolarization field and domain fatigue decomposition are used to explain the effect of electrode structure. Furthermore, the driving voltage based on normal speed-functionality is designed, and the testing results show that the line electrode structure could induce a robust switching, which is determined by the free charges concentration in active layer. These findings provide an effective route to design the optimum structure for a ferroelectric capacitor based on P(VDF-TrFE) copolymer ultrathin film.
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